[UD-1580] Remove kube-rbac-proxy

[matheusfm]

Description

This PR removes kube-rbac-proxy container to use WithAuthenticationAndAuthorization.

The kustomize files are also updated according to the latest kubebuilder version scaffold.

Linked Issues

Closes #323
Closes undistro/helm-charts#4

How has this been tested?

# Create Kind cluster
kind create cluster

# Install the latest release of Zora
helm install zora undistro/zora -n zora-system --create-namespace --wait --set clusterName=kind-kind

# Bind the "zora-operator-metrics-reader" role to the default service account in zora-system namespace
kubectl create clusterrolebinding metrics-reader --clusterrole=zora-operator-metrics-reader --serviceaccount=zora-system:default

# Create a Pod in zora-system namespace (which will use the default service account) containing the curl command
kubectl -n zora-system run curl-$RANDOM --image=radial/busyboxplus:curl --rm=true -i --tty

# From the curl Pod, calls the /metrics API providing the service account token.
curl -s -k -H "Authorization: Bearer $(cat /var/run/secrets/kubernetes.io/serviceaccount/token)" https://zora-metrics:8443/metrics
# Note that without the toke, the request fails

# OK, the metrics should be working through the proxy.

# Open another terminal session

# Checkout this branch
git fetch; git checkout UD-1580-remove-kube-rbac-proxy

# Build the images from this branch
make kind-load-images

# Uninstall Zora
helm uninstall zora -n zora-system

# Install Zora from the current branch
helm install zora ./charts/zora -n zora-system --create-namespace --wait --set clusterName=kind-kind \
--set scan.worker.image.repository=worker \
--set scan.worker.image.tag=latest \
--set operator.image.repository=operator \
--set operator.image.tag=latest

# Go back to the curl pod and the same request should keep working!

Checklist

• I have labeled this PR with the relevant Type labels
• I have documented my code (if applicable)
• My changes are covered by tests